How do I create a Mobile Hotspot on Z30?

I'm having trouble getting a new windows tablet to detect and connect to my z30 hotspot. The tablet wifi is fine - works on all other open and secure wifi networks, but not my z30 or wife's 9900. With the 9900, if I create an open hotspot (no security) , it will connect fine.

I don't see an option in the z30 to create an open hotspot.

I can use Bluetooth tether, but it is slower, and more cumbersome to connect.

The mobile hotspot feature on my z30 works with other devices, but not my new lenovo yoga 2 windows tablet. It's weird. The tablet works great on all other hot spots, and other devices have no problem connecting to my z30, but the two don't seem to want to "talk" to each other.

Since my wife's 9900 works with it when open but not secured, I'm assuming there is a security incompatibility between BlackBerry and lenovo.